96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/* $OpenBSD: vasprintf.c,v 1.4 1998/06/21 22:13:47 millert Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#if 0
|
|
__FBSDID("FreeBSD: src/lib/libc/stdio/vasprintf.c,v 1.16 2002/08/21 16:19:57 mike Exp ");
|
|
#endif
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <wchar.h>
|
|
#include "local.h"
|
|
|
|
int
|
|
vswprintf(wchar_t * __restrict s, size_t n, const wchar_t * __restrict fmt,
|
|
__va_list ap)
|
|
{
|
|
FILE f;
|
|
struct __sFILEX ext;
|
|
mbstate_t mbs;
|
|
char *mbp;
|
|
size_t mbresult;
|
|
int ret, sverrno;
|
|
|
|
if (n == 0) {
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
|
|
f._file = -1;
|
|
f._flags = __SWR | __SSTR | __SALC;
|
|
f._bf._base = f._p = (unsigned char *)malloc(128);
|
|
if (f._bf._base == NULL) {
|
|
errno = ENOMEM;
|
|
return (-1);
|
|
}
|
|
f._bf._size = f._w = 127; /* Leave room for the NUL */
|
|
f._extra = &ext;
|
|
INITEXTRA(&f);
|
|
ret = __vfwprintf(&f, fmt, ap);
|
|
if (ret < 0) {
|
|
sverrno = errno;
|
|
free(f._bf._base);
|
|
errno = sverrno;
|
|
return (-1);
|
|
}
|
|
*f._p = '\0';
|
|
mbp = f._bf._base;
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
/*
|
|
* XXX Undo the conversion from wide characters to multibyte that
|
|
* fputwc() did in __vfwprintf().
|
|
*/
|
|
if (mbsrtowcs(s, (const char **)&mbp, n, &mbs) == (size_t)-1) {
|
|
free(f._bf._base);
|
|
errno = EILSEQ;
|
|
return (-1);
|
|
}
|
|
free(f._bf._base);
|
|
if (s[n - 1] != L'\0') {
|
|
s[n - 1] = L'\0';
|
|
errno = EOVERFLOW;
|
|
return (-1);
|
|
}
|
|
|
|
return (ret);
|
|
}
|